Gas burner



Dec. 1924. 1,517,394

J. A. BENGTSON GAS BURNER Filed- Feb. 5, 1923 Patented Dec 2, 1924;.

FFICE.

JOHN A. IBENGTSON, or KANE, rnnnsY vema, essrenon or ONE-HALF TO HJALMER swenson, or Kenn, PENNSYLVANIA.

GAS BURNER.

Application filed February 3, 1923.

Too whom-it may concern:

Be it known that I, JOHN A. BENGTSON, a citizen of the United States, residing at Kane, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Gas Burners, of which the following is a specification.

This inventionrelates to improvements in burners of that type more particularly designedfor use in connection with natural g l The primary object ofthis invention isto produce efficient combustion with natural gas under low pressures.

In the'forms of'burners for natural gas now in common use, the gas is commingled with air, within a mixing chamber, and the amount of air with which the gas is diluted, is governed by the size of the apertures through which the air is introduced into the mixing chamber.

To those skilled in the art, it is well known that the gas has to be introduced into the'mixing chamber at a predetermined pressure to provide a suflicient volume to form an effective combustible mixture.

When an over diluting of the gas occurs, through an eiicessive commingling of air therewith, there will be a backfiring in the mixing chamber. By my'improved burner I amable to overcome the difficulties encountered with a low gas pressure, and am able to produce eflicient combustion on a gas pressure below that which is required for eflicient operation of" the burners now in common use.

In the accompanying drawings I have illustrated the preferred embodiment of the invention, and the improved details of construction and arrangement of parts thereof will be apparent, from the specific description hereinafter contained, when read in connection with such drawings. I

In the drawings:

Fig. l is a view in perspective of my improved burner.

Fig. 2 is a longitudinal sectional View of the complete burner, showing the relative location and arrangement of the parts.

Fig. 3 is a view partly in section taken on the line 33 in Fig. 2.

Fig. 4 is a view partly in section taken on the line 44 in Fig. 2.

Referring more specifically to the draw- Serial No. 616,762.

ings, wherein likereference numerals designate corresponding parts in the several views, 1, represents the gas supply chamber within a tubular casting, 2, which is rectangular in cross section. Gas is fed to the supply chamber 1, by a supply pipe 2, in a manner wellknown in the art.

Located in the upper wall of the tubular casting 2, and spaced apart thereim-a're .a plurality of apertures 3; these apertures are formed by first drilling a relatively large hole 4, in the casting walLwhich is closed by a plug 5, screw threadedthereiii, composed of non-corrosive metal and having a small aperture 3, drilled there through, of a predetermined size to exude the correct volume of gas. These plugs may be flush with the top wall or may be vertical- 1y adjusted, in view of the threaded mounting and straight sides.

Positioned over the casting 2, is a companion casting 6, formed with vertically disposed apertures 7, positioned in each end thereof. v

the tubular casting 2, arethe studs 8. The studs 8, are adapted to be inserted within. the apertures 7, to hold the tubular casting 2. and the companion casting 6, in assembled position as shown in Fig. 2.

The companion casting 6, is adapted for vertical movement withrespect to the tubular casting 2, to vary the amountof space interposed between the castings 2 and B. When the relative position of the casting 6, has been adjusted. in respect to its elevation over the casting 2, its position is locked by the setting up of the set screws 12.

To elevate the casting 6, the set screws 13 are screw threaded in the casting 6, with their bearing ends engaging the top sue face of the casting 2.

Located in the companion casting 6, and relatively spaced over the apertures 3, in the tubular casting 2, are the proportionate- 1y larger apertures 9. Screw threaded into each of the apertures 9, are the tubemembers 10. With the companion casting ti, ro erly mounted the tubular casting 2, the tube members 10, will be positioned in axial alignment with each of the apertures 3, over which they are positioned. The tube members 10, are shown of a convenient length, for the general purposes for which Projecting upwardly from each end pfthe burner is designed. Other length tube members may be substituted to take care of special conditions.

The burner here shown is particularly adapted for enclosed heaters, furnaces, steam boilers and the like, and in actual practice it has been found to operate successfully on very low pressures of gas resulting in great saving thereof.

In the novel construction shown, and the arrangement whereby the gas within the reservoir 1, of the casting 2, in escaping through the apertures 3, is projected into the tube members 10, a jet action is set up, whereby a siphoning effect is created upon that portion of the air interposed between the castings 2 and 6, surrounding the apertures 3, and the air so aliected is thereby drawn into the tube members 10, and is commingled therein with the gas, to form an intimate mixture that insures complete combustion.

It will be observed that the air with which the primary diluting of the gas is accomplished, is not drawn from a restricted supply, as is the common practice in the art, but is drawn from the free air within the firebox or enclosure in which the burner is positioned. It will also be apparent to those skilled in the art, that the air so used and commingled with the gas will have the advantage of having been pre-heated before its contact with the gas, and that the volume of air so used will be governed by strength of the siphoning effect, actuated by the jet action set up by the gas projected from the apertures 3, into the tube members 10, which will be in proportion to the strength of gas pressure from which the jet action is derived.

A further regulation of the strength of the jet action is provided for, in the means for varying the distance between the aperture 3, and position of the lower extremity of the tube members 10, by the movement of the screws 13. In like manner the strength of the jet action may be varied progressively through the series of the tube members, by spacing the distance between the casting 2 and the casting 6 greater at the one end than at the other, which is accomplished by the variable movement of the screws 13.

By this variable spacing, I am able to provide a greater or lesser degree of heat, at either end of the burner, as may be desired.

It will also be obvious to those skilled in the art, that as combustion of the gases discharged from the tubular members 10 concombustion. The air coming in contact with the under surface of the casting 6 will like wise become heated, and as the air drawn into the tubular members 10, is taken from that air supply adjacent to the casting 6, th air commingled with the gas from the discharge openings 3, will have been preheated. an advantage well known in the art.

As the gas is introduced into the gas supply chamber 1, within the casting 2, it will find escapement through the apertures 3. The volume of such escapement will be governed by the gas pressure in the mains from which the reservoir is fed, and the rate of escapement will effect the strength of the jet action.

It will be apparent to those skilled in the art, that I provide means whereby the amount of air commingled with the gas, is automatically apportioned in conformity with the degree of pressure in the mains from which the gas is drawn.

.Vhile I have herein disclosed a particu lar embodiment of the invention it will be apparent to persons skilled in the art that changes and alterations may be made there in. and still other embodiments resorted to. without departing from the spirit of the invention, as found within the scope of the her to appended claim.

Having described the invention, I claim.

In a device. of the class described, a gas reservoir, vertically movable gas discharging elements mounted in the upper wall of the reservoir, and normally flush with its upper surface, a gas mixing member comprising a heavy heat radiating bodv spaced from said upper wall and includingflues positioned to register with the gas discharg ing elements. mounting means including studs and adjust ng devices passing verticallv through said body, the ends of the adjnstinqdevices bearing on the upper wall. and these devices being operable for independentlv varying the elevation of opposite ends of the mixing member with reference to an adiusted position of the vertically movable elements through which gas is discharged from the reservoir, and retaining devices passin laterally through the body and engaging the studs, the lower surface of the body being continuous and unobstructed between the jets formed by the discharged gas.

In testimony whereof I have affixed my signature.

JOHN A. BENGTSON. 

